Option H6: Gas exchange

H.6.1 Define partial pressure

H.6.2 Explain the oxygen dissociation curves of adult haemoglobin, fetal haemoglobin and myoglobin

H.6.3 Describe how carbon dioxide is carried by the blood, including the action of carbonic anhydrase, the chloride shift and buffering by plasma proteins

H.6.4 Explain the role of the Bohr shift in the supply of oxygen to respiring tissues

H.6.5 Explain how and why ventilation rate varies with exercise

H.6.6 Outline the possible causes of asthma and its effects on the gas exchange system

H.6.7 Explain the problem of gas exchange at high altitudes and the way the body acclimatizes